SSR » delabs Design Devices

Three Phase Solid State Relay

Electrical, Power Electronics No Responses »

Sep 202008

This is R-Y-B three phase 40A 440V AC Solid State Relay with 3-30 V DC Control Signal. It has Built in HeatSink and Fan. It is good for Controlling a Bank of heaters. This model could go upto 120A with SSR’s in parallel for Proportional Control. Solid State Relays SSR.

This is a Contacter replacement, it will switch R-Y-B phases. It is a high power SSR. In some places it is unwise to use an SSR, a Electromechanical Contacter will perform better. The merit of SSR is fast switching, no wear and tear. No dust humidity influence.

Three Phase SSR

NO-NC SSR Plastic Box

Electrical, Power Electronics No Responses »

Sep 162008

This was a Fire Retardant Plastic Box which was made for the SSR I/O Stackable Modules. DC Control for an AC Load. Usually it is to control another Big Three phase contactor; Pneumatic or Steam Valve, Solenoids-Motors. When Mounted at the end of the PCB it offers over 2kV Isolation from the Digital Circuits. The Output 230V signals NO-NC, can control Light Loads like the Coil of a Big 230V Relay also called contactor.
NO NC SSR Box

It could be Mounted on a PCB by soldering or a Plugin Base. It is better to have Crimped connections or Terminals. A very good quality spring Loaded Socket may also work but it has to be rated for many operations. Things like Nickle Alloy Plated, Beryllium Copper were the Materials Jargon. A contact resistance in the Terminals, a mismatch of alloys, electrochemical reactions, Corrosive Fumes, Brine or High Humidity can build a Loose connection into a Dangerous Sparking Contact.

Not only the Functionality of the SSR will be affected in a Sparking Contact, but a Risk of a Fire Developing. When Inflammable Materials or Volatile Liquids are Present Nearby, the risk is even greater. Read More – Solid State Relays SSR

Connection Diagram of DC PCB SSR

Power Electronics No Responses »

Jun 242008

This is an Application note i used to give with my ssr – app012.pdf – Ananth Diagram of SSR 5000 DC 3-30 Control / 230V AC N.O. @ 3A. This is a Thyristor Based Normally Open 230V Switch that can be turned on / off at a fast rate. This switches at Zero Crossover . Use 5V DC for Best Results. No moving parts hence no wear and tear. Dissipates Heat when in On Condition 5 Watts @ 3 Amps. Mount with adequate Air Ventilation for 3 Amps. Dissipation is 1.4 Watts per Amp thru Load. Input to Output is [Read More ....]

Connection Diagram of AC Control SSR

Power Electronics No Responses »

Jun 232008

This is an Application note i used to give with my ssr – app011.pdf – Ananth SSR or Solid State Relay or Electronic Relay This is a Thyristor Based Normally Open 230V Switch that can be turned on / off at a fast rate. This switches at Zero Crossover .Built In Snubber reduces EMI and protects the SSR. USE SAME PHASE FOR I/P & O/P. No moving parts hence no wear and tear. Dissipates Heat when in On Condition. Use adequate Heat Sink or SSR will fail. ( 10g / Amp) Dissipation is 1.5 Watts per Amp thru Load. Input [Read More ....]

Zero-Crossing-Triac-Driver-MOC3041

Integrated Circuits, Power Electronics No Responses »

Oct 172006

Zero-Crossing-Triac-Driver-MOC3041 The MOC303XM and MOC304XM devices consist of a AlGaAs infrared emitting diode optically coupled to a monolithic silicon detector performing the function of a zero voltage crossing bilateral triac driver. MOC3041 They are designed for use with a triac in the interface of logic systems to equipment powered from 115 VAC lines such as teletypewriters, CTRs, solid-state relays, industrial controls, printers, motors, solenoids and consumer appliances, etc. Simplifies logic control of 115 VAC power Zero voltage crossing dv/dt of 2000 V/µs typical, 1000 V/µs guaranteed Motorola used to make these then it was Infineon Technologies now Isocom also makes [Read More ....]